BluesBox CBG ~ 4 String Cigar Box Guitar with open-tuning feature | Reverb Australia
3 Alternative Tunings For 4-String Cigar Box Guitar – Beginner Cigar Box Guitar
Four-String Cigar Box Guitar Songbook Volume 1: 30 Well-Known Traditional Songs Arranged for 4-string Open G "GDGB" Tuning: Baker, Ben "Gitty": 9781091815292: Books - Amazon.ca
How To Tune A Three String Cigar Box Guitar – FuelRocks